56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
package service
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import (
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"fmt"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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// AuthService 是认证服务
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type AuthService struct {
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secret []byte
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}
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func NewAuthService(secret string) *AuthService {
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return &AuthService{secret: []byte(secret)}
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}
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// Claims 是 JWT 宣告
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type Claims struct {
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UserID string `json:"user_id"`
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Role string `json:"role"`
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jwt.RegisteredClaims
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}
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// IssueToken 签发 JWT Token，有效期 8 小时
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func (s *AuthService) IssueToken(userID, role string) (string, error) {
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claims := Claims{
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UserID: userID,
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Role: role,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(8 * time.Hour)),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString(s.secret)
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}
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// ParseToken 验证并解析 Token
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func (s *AuthService) ParseToken(tokenStr string) (*Claims, error) {
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token, err := jwt.ParseWithClaims(tokenStr, &Claims{}, func(token *jwt.Token) (any, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
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}
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return s.secret, nil
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})
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if err != nil {
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return nil, fmt.Errorf("parse token: %w", err)
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}
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if claims, ok := token.Claims.(*Claims); ok && token.Valid {
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return claims, nil
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}
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return nil, fmt.Errorf("invalid token")
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}
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